The digital dance divide refers to the gap between people with effective access to dance games (e.g. Dance Dance Revolution, Just Dance, Dance Party, etc ..) and those with very limited or no access at all. This can be seen in the field during a high school dance where a group of students show great skills in repeating solo dance moves in the game(s) and the rest displaying only rudimentary moves.

This high school dance is lame. Most of the people are just standing there. Just a few Just Dance nerds in the corner, showing off. Must be Digital Dance Divide.